title: Problems with epidemiologic studies on Helicobacter pylori in India.
authors.affiliation: Division of Digestive Diseases and Clinical Nutrition, Tata Memorial Hospital, Mumbai.
authors.forename: K M
authors.initials: KM
authors.lastname: Mohandas
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D016481:Helicobacter Infections / Q000453:epidemiology*; D016480:Helicobacter pylori; D006801:Humans; D007194:India / Q000453:epidemiology; D007223:Infant; D008297:Male; D008875:Middle Aged; D012107:Research Design; D015983:Selection Bias